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4 protocols using 1 methyl 3 propylimidazolium iodide

1

Dye-Sensitized Solar Cell Fabrication

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All the dyes were synthesized according to the previously published procedures [20 (link)]. The dyes purity was determined to be at least 97% by HPLC. All the other chemicals were of sufficient grade and used without further purification. Acetic acid, acetone, and anhydrous EtOH were obtained from Avantor Performance Materials (Gliwice, Poland), anhydrous acetonitrile and HPLC grade DCM from Sigma Aldrich (St. Louis, MO, USA), and anhydrous THF from Acros Organics (Fair Lawn, NJ, USA). 1-methyl-3-propylimidazolium iodide, lithium iodide, iodine, 4-tert-butylpyridine, titanium(IV) chloride, hexachloroplatinic acid, α-terpineol, ethylcellulose, and CDCA were received from Sigma Aldrich, while tetrabutylammonium hexafluorophosphate was from TCI Chemicals (Tokyo, Japan). TCO22-7 FTO glass substrates were obtained from Solaronix, P25 Aeroxide titania nanopowder from Evonik (Essen, Germany).
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2

Synthesis of Lead-Free Perovskite Solar Cells

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Bismuth oxide (Bi2O3, 99.99%), 4-nitro-o-phenylenediamine (≥99%), boric anhydride (≥98%), boron standard solution (999.5 mg L−1 ± 20 mg L−1), bismuth standard for ICP traceCert® (1000 mg L−1 Bi in nitric acid), potassium hydroxide (KOH, ≥85%, pellets), Nafion (≤100%), lithium iodide (99.9%), 4-tert-butylpyridine (98%), guanidinium thiocyanate (99%), 1-methyl-3-propylimidazolium iodide (99.99%), acetonitrile (≥99.9%), poly(vinyl acetate) (99.9%), absolute ethanol (99.5%), eosin B (97%) and indium tin oxide (ITO) coated glass slides (15 Ω, 30 × 30 × 0.7 mm) were purchased from Sigma-Aldrich, South Africa.
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3

Synthesis and Characterization of Dye-Sensitized Solar Cells

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Ammonium molybdate tetrahydrate ((NH4)6Mo7O24·4H2O, 99.98%), sodium sulfide nonahydrate (Na2S·9H2O, 99.99%), potassium chloride (KCl, 99%), acetonitrile (ACN, CH3CN, 99%), dimethyl sulfoxide (DMSO, (CH3)2SO, 99.5%), ethanol (EtOH, CH3CH2OH, 99.8%), guanidinium thiocyanate (NH2C(=NH)NH2·HSCN, 99%), iodine (I2, 99.8%), 1-methyl-3-propylimidazolium iodide (C7H13IN2, 98%), 4-tert-butylpyridine (C9H13N, 98%), valeronitrile (CH3(CH2)3CN, 99.5%), chloroplatinic acid hexahydrate (H2PtCl6·6H2O, ≥37.50% Pt), sulfuric acid (H2SO4, 95–98%), polyvinylpyrrolidone (PVP, (C6H9NO)n, average Mw 10,000), and sodium borohydride (NaBH4, 99%) were purchased from Sigma-Aldrich (Germany). Low-temperature thermoplastic sealant (Surlyn, 25 μm), 18NR-T transparent titania paste (particle size of 20 nm), 18NR-AO active opaque titania paste (particle sizes of 20 and 450 nm), fluorine-doped tin oxide (FTO, TEC8 glass plates, 8 Ω·cm−2, 2.2 mm thickness), and N719 industry standard dye (N719) were purchased from Dyesol (Australia). All commercial chemicals were of analytical grade and were used as supplied without further purification.
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4

Solid-State Dye-Sensitized Solar Cell Fabrication

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Poly(1-vinylpyrrolidone-co-vinyl acetate) (P(VP-co-VAc)) (Mw, ~50,000 g mol−1), ethylene carbonate (EC), propylene carbonate (PC), 1-methyl-3-propylimidazolium iodide (MPII), tetrapropylammonium iodide (TPAI) and sensitizing dye di-tetrabutylamm onium cis-bis(isothiocyanato)bis(2,2′-bipyridyl-4,4′-dicarboxylato)ruthenium(II) (N719) were purchased from Sigma Aldrich. KI and iodine chip (I2) were purchase from Friedemann Schmidt Chemical. P(VP-co-VAc), KI, and TPAI were dried in the vacuum oven at 50 °C prior to use.
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